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Skildring:The target strength of individual fish depends on swimbladder inflation. Measured target strength from salmon in a net pen before, during and after the surface was closed with a netting roof. Lack of access to the surface deprived the fish from access to air for filling their swimbladders. Measurements in three different net pens showed the same trend (one colour for each net pen).
Kode: HAV-67265
Kreditering: Tonje Nesse Forland / Havforskningsinstituttet
Søkeord: CRIMAC, Salmon, Target strength, xxxInExternalxxx
AI-søkeord: akustisk måling, datavisualisering, decibelskala, eksperimentelle fasar, punktdiagram, vitskapleg forsking, målstyrke, tre datasett, tidsseriedata, undervassakkustikk
AI-tekster: -20, M14, -25, -30, Bubbles, -35, TS [dB re 1 m2], -40, Before, -45, roof, Roof off, Roof on, -50, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, Time [Days], -20, M14, -25, -30, Bubbles, -35, TS, [dB, re, 1, -40, Before, -45, roof, Roof, off, Roof, on, -50, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, Time, [Days]
Alternativ tekst: Spreiingsplott som viser målstyrke (TS) over tid for tre fiskar (M13, M14, M16) under tilhøva tak-på og tak-av.
Filtypar: Original (1635 x 841), Liten(JPG) (1080 x 556)

HAV-67265
The target strength of individual fish depends on swimbladder inflation. Measured target strength from salmon in a net pen before, during and after the surface was closed with a netting roof. Lack of access to the surface deprived the fish from access to air for filling their swimbladders. Measurements in three different net pens showed the same trend (one colour for each net pen).
Tonje Nesse Forland / Havforskningsinstituttet
Original (1635 x 841)
Liten(JPG) (1080 x 556)

Skildring:CRIMAC Annual Report 2023. Figure showing estimation of spheroidal wave functions. Babak Khodabandeloo (HI).
Kode: HAV-67257
Kreditering: Babak Khodabandeloo Spheroidal wave functions / Havforskningsinstituttet
Søkeord: CRIMAC, Annual Report, 2023, Spheroidal, Wave, Functions, Prolate spheroid, xxxInExternalxxx
AI-søkeord: akustisk spreiing, analytisk løysing, COMSOL-simulering, frekvensrespons, frekvensspektrum, numerisk samanlikning, langstrekt sfæroide, målstyrke, undervassakkustikk, Van Buren sfæroidale bølgjefunksjonar
AI-tekster: a=0.08, b=0.02, M=61, N=61, -30, -40, -50, TS -60, -70, Analytic with Van Buren SWF, -80, Comsol Solution, Comsol Solution, -90, 0, 50, 100, 150, 200, 250, Frequency (kHz), a=0.08,, b=0.02,, M=61,, N=61, -30, -40, -50, TS, -60, -70, Analytic, with, Van, Buren, SWF, -80, Comsol, Solution, Comsol, Solution, -90, 0, 50, 100, 150, 200, 250, Frequency, (kHz)
Alternativ tekst: Graf som samanliknar målstyrke (TS) mot frekvens (kHz) for analytiske Van Buren SWF- og COMSOL-løysingar, og som viser god samsvar over 80 kHz.
Filtypar: Original (1200 x 1033), Liten(JPG) (1080 x 930)

HAV-67257
CRIMAC Annual Report 2023. Figure showing estimation of spheroidal wave functions. Babak Khodabandeloo (HI).
Babak Khodabandeloo Spheroidal wave functions / Havforskningsinstituttet
Original (1200 x 1033)
Liten(JPG) (1080 x 930)

Skildring:Broadband echogram showing backscattering by a small natural seep of methane (red box) near Node 7 of the Lofoten Vesterålen Ocean Observatory. The broadband frequency response of the seep is also shown (lower right inset). The seep consists of a few small single bubbles rising from the seafloor at a depth of 220 meters, clearly observed in the broadband data.
Kode: HAV-67242
Kreditering: Geir Pedersen / Havforskningsinstituttet
Søkeord: Bubble acoustics, CRIMAC, EK80, Gas seeps, Methane seeps, xxxInExternalxxx
AI-søkeord: akustisk tilbakespredning, djuphavsscanning, djupnemåling, ekkolodddata, ekogram, marin undersøking, havbotnsdeteksjon, sonarskjerm, undervassakkustikk, vassøylevisualisering
AI-tekster: 50, 100, 150, 200, 2022.12.01, 21:20 UTC, 21:23, 21:25, 21:28, 4115.8 nmi, 4116 nmi, 4116.2 nmi, 4116.4 nmi, 4116.6, 50, 100, 150, 200, 2022.12.01, 21:20, UTC, 21:23, 21:25, 21:28, 4115.8, nmi, 4116, nmi, 4116.2, nmi, 4116.4, nmi, 4116.6
Alternativ tekst: Ekogram som viser undervassonardata med framheva anomali på djupne ~200 m, registrert 1. desember 2022, 21:20 UTC.
Filtypar: Original (1467 x 485), Liten(JPG) (1080 x 357)

HAV-67242
Broadband echogram showing backscattering by a small natural seep of methane (red box) near Node 7 of the Lofoten Vesterålen Ocean Observatory. The broadband frequency response of the seep is also shown (lower right inset). The seep consists of a few small single bubbles rising from the seafloor at a depth of 220 meters, clearly observed in the broadband data.
Geir Pedersen / Havforskningsinstituttet
Original (1467 x 485)
Liten(JPG) (1080 x 357)

Skildring:Narrowband noise in a broadband signal
Kode: HAV-67234
Kreditering: Rolf Korneliussen / Havforskningsinstituttet
Søkeord: Broad band, CRIMAC, EK80, LSSS, Noise measurements, xxxInExternalxxx
AI-søkeord: akustisk støy, botnforstyrring, frekvensanalyse, frekvens kHz, varmekartvisualisering, støyvariasjon, pingnummer, signalhandsaming, sonar-spektrogram, undervassakkustikk
Alternativ tekst: Spektrogram som viser støymønster frå sonar: stabile frekvensbånd og tidsvariabel botninterferens, plotta mot pingnummer og frekvens.
Filtypar: Original (517 x 478)

Skildring:2024.09.25 CRIMAC experiments in Austevoll Research Station. We conduct acoustic broadband echo measurements on a caged population of salmon from small size to large (0,4kg to 3kg) over the season of 2024
År: 2023
Kode: HAV-23066
Kreditering: Rokas Kubilius / Havforskningsinstituttet
Søkeord: CRIMAC, Austevoll, Austevoll Research Station, Broadband, Acoustic, Echosounder, Salmon, xxxInExternalxxx
Kategoriar: Forsking, Prøvetaking og målingar
AI-søkeord: djupnemåling, ekko-integrasjon, deteksjon av fiskestim, ekkoloddskjerm, maritim elektronikk, Fleirstrålesonar, vitskapleg fiskeriundersøking, Simrad ekkolodd, sonardata, undervassakkustikk
AI-tekster: !, SIMRAD, 123, 000, WBT, WBT, WBT, WBT, User Settings, 15200, ES70-7, ES70-7, ES120, ES120, ES120, ES200, ES38-7, Sv (20, SV (20, N, !, SIMRAD, 80, 123, 000, 0.0, 0.0, 0.0, PSU, E, WBT, WBT, WBT, WBT, User, Settings, 15200, ES70-7, ES70-7, ES120, ES120, ES120, ES200, ES38-7, Sv, (20, (20, SV, (20
Alternativ tekst: Simrad EK80 vitskapleg ekkolodd-skjerm som viser fleire frekvensar av sonarkanalar med djupnemålingar og ekogram av fiskestimar.
Filtypar: Original (4032 x 1908), Medium(JPG) (1920 x 909), Liten(JPG) (1080 x 511)

HAV-23066
2024.09.25 CRIMAC experiments in Austevoll Research Station. We conduct acoustic broadband echo measurements on a caged population of salmon from small size to large (0,4kg to 3kg) over the season of 2024
Rokas Kubilius / Havforskningsinstituttet
Original (4032 x 1908)
Medium(JPG) (1920 x 909)
Liten(JPG) (1080 x 511)

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